Wilwood Rear AERO4 Electronic Parking Brake Kit, Black Calipers and 14-Inch GT Rotors, Small Ford 2.50-Inch Axle Offset

Convert a measured Small Ford rear axle with black AERO4 calipers, 14-inch GT rotors and electronic parking. Confirm the 2.50-inch axle offset. This conversion keeps hydraulic service braking and electric parking in separate calipers selected for the documented mounting arrangement. From its base in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components. Bill Wood founded the company in 1977. Its calipers, brake rotors, valves, master cylinders, brake lines and fittings serve street-performance, motorsport and specialized applications. Select each component according to the requirements of the complete braking system.

Technical Details

• Manufacturer part number: 140-16175
• Kit function: Rear Brake Kits - Street Performance; rear position
• Service calipers: 4-piston AERO4; Black Powder Coat
• Caliper mounting: Radial; piston material: stainless steel
• Rotor package: 14.00 × 1.10 inches; Spec-37 Iron; vented; GT Slotted
• Supplied service-pad compound: BP-20
• Hydraulic inlet: 1/8-27 NPT
• Rotor / hub bolt-circle specification: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm
• Housing / axle interface: Small Ford; axle offset 2.50 in
• Nominal wheel diameter reference: 18 in; verify the complete clearance drawing
• Hydraulic flexlines: Not included
• Included installation items: mounting hardware
• Not supplied: spindles, wheel hubs, master cylinder, brake booster
• Quantity: Sold as a kit.

Fitment & Compatibility

This conversion is selected by the Small Ford housing flange and a measured 2.50-inch axle offset. Compare the housing bolt centers, bearing retainer, axle registration and offset with the Wilwood worksheet before choosing a kit. The 1990 Lincoln Town Car entry in the table below requires individual axle verification; model year alone does not establish compatibility. The electric parking system includes its control unit and harness and is for parking, not an emergency stopping brake. Provide compatible hydraulic lines separately and check the complete wheel envelope against DS-1424.

Wilwood product specifications · Installation instructions · Technical bulletin

With over 20 years of parts and fitment experience, PMB Performance can help compare the actual axle flange, rotor relationship and hydraulic arrangement. Share measurements and photographs of the installed assembly before ordering.

Manufacturer warning — brake pads only: WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov.